我有这个代码创建了一个UIBarButtonItem:
UIBarButtonItem *backButton = [[UIBarButtonItem alloc]
initWithTitle: @"ToDo"
style: UIBarButtonItemStyleBordered
target:self action: @selector(popToRoot:)];
[self.navigationItem setLeftBarButtonItem:backButton];
问题是删除左箭头,我想在文本旁边包含它。我怎么能这样做?
谢谢,
彼得
答案 0 :(得分:2)
试试这段代码
UIButton *backBtn = [UIButton buttonWithType:UIButtonTypeCustom];
UIImage *backBtnImage = [UIImage imageNamed:@"BackBtn.png"] ;
[backBtn setBackgroundImage:backBtnImage forState:UIControlStateNormal];
[backBtn addTarget:self action:@selector(goback) forControlEvents:UIControlEventTouchUpInside];
backBtn.frame = CGRectMake(0, 0, 54, 30);
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithCustomView:backBtn] ;
self.navigationItem.leftBarButtonItem = backButton;
然后像这样定义goback方法
- (void)goback
{
[self.navigationController popViewControllerAnimated:YES];
}
注意:BackBtn.png将包含ToDo文本和后退按钮图像......
如果你想没有图像,那么添加以下代码......
-(void)viewWillAppear {
self.title = @"Your Title"
}
-(void)viewWillDissapear {
self.title = @"ToDo"
}
当你进入下一个视图时,这将创建ToDo ......